From owner-freebsd-questions@FreeBSD.ORG Wed Jun 16 09:15:07 2004 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8B53416A4CE for ; Wed, 16 Jun 2004 09:15:07 +0000 (GMT) Received: from auk2.snu.ac.kr (auk2.snu.ac.kr [147.46.100.32]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2BF8943D31 for ; Wed, 16 Jun 2004 09:15:07 +0000 (GMT) (envelope-from stopspam@users.sourceforge.net) Received: from [147.46.44.181] (stopspam@users.sourceforge.net) by auk2.snu.ac.kr (Terrace Internet Messaging Server) with ESMTP id 2004061618:13:13:397850.13435.2375519152 for ; Wed, 16 Jun 2004 18:13:13 +0900 (KST) Message-ID: <40D00F37.7040102@users.sourceforge.net> Date: Wed, 16 Jun 2004 18:13:27 +0900 From: Rob User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.6) Gecko/20040507 X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-TERRACE-SPAMMARK: NO (SR:1.83) (by Terrace) Subject: Harddisk "UDMA ICRC error..." from kernel at bootup. What does it mean? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 16 Jun 2004 09:15:07 -0000 Hi, A friend of mine switched from Windows XP to FreeBSD, because I "garanteed" that FreeBSD would be faster. I also want to optimize performance as much as possible. I'm therefore worried about the following messages from the kernel at bootup: [...snip...] ad0: 16448MB [33420/16/63] at ata0-master UDMA66 ad1: 76319MB [155061/16/63] at ata0-slave UDMA66 acd0: CD-RW at ata1-master PIO4 Mounting root from ufs:/dev/ad0s1a ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) retrying ad1s5c: UDMA ICRC error reading fsbn 93787664 of 46885768-46885895 (ad1s5 bn 93787664; cn 5838 tn 3 sn 5) falling back to PIO mode --- Both harddisks are on the same IDE 40-pin cable as master and slave. ad0 is the FreeBSD formatted harddisk; one slice and several FreeBSD partitions. ad1 is from a former Windows XP installation, with two partitions: ad1s5 (ntfs) and ad1s6 (msdos). I don't understand much of the lines above. The last line says it falls back to PIO mode due to errors with ad1s5c. What does that mean? Will it use the slow 16.6 MB/s data exchange from disk to host? Does this then also imply that both disks use PIO/slow data exchange speed? (remember: both disks are on the same cable to the motherboard). What can I do to get things better and faster? And also: is this "UDMA ICRC error" because it's a Windows/DOS partition? Would formatting to FreeBSD filesystem solve the problem? Thanks, Rob.